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No. 13 Roman to Integer (EASY,PASS) 将罗马数字转成整数。 Solution:罗马数字表示由大到小,除了六种情况表示4,9,40,90,400,900。(EASY) No. 14 Longest Common Prefix Solution Tip:首先定位长度最短 阅读全文
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No. 9 Palindrome Number (简单,PASS) Solution: Firstly, if the interger is negative, then we can confidently return false. Then, we can convert the integ 阅读全文